Remember, how often the great art of the past didn't look great at first, how often it didn't look like art at all; how much easier it is, decades or centuries later, to adore it, not only because it is, in fact, great but because it's still here; because the inevitable little errors and infelicities tend to recede in an object that's survived the War of 1812, the eruption of Krakatoa, the rise and fall of Nazism.